internal static CodeNode Parse(ParseInfo state, ref int index)
{
int i = index;
while (Tools.IsWhiteSpace(state.Code[i]))
{
i++;
}
if (!Parser.Validate(state.Code, "for(", ref i) && (!Parser.Validate(state.Code, "for (", ref i)))
{
return(null);
}
while (Tools.IsWhiteSpace(state.Code[i]))
{
i++;
}
CodeNode init = null;
CodeNode body = null;
CodeNode condition = null;
CodeNode post = null;
CodeNode result = null;
var labelsCount = state.LabelsCount;
var oldVariablesCount = state.Variables.Count;
state.LabelsCount = 0;
state.lexicalScopeLevel++;
try
{
init = VariableDefinition.Parse(state, ref i, true);
if (init == null)
{
init = ExpressionTree.Parse(state, ref i, forForLoop: true);
}
if ((init is ExpressionTree) &&
(init as ExpressionTree).Type == OperationType.None &&
(init as ExpressionTree)._right == null)
{
init = (init as ExpressionTree)._left;
}
if (state.Code[i] != ';')
{
ExceptionHelper.Throw((new SyntaxError("Expected \";\" at + " + CodeCoordinates.FromTextPosition(state.Code, i, 0))));
}
do
{
i++;
}while (Tools.IsWhiteSpace(state.Code[i]));
condition = state.Code[i] == ';' ? null as CodeNode : ExpressionTree.Parse(state, ref i, forForLoop: true);
if (state.Code[i] != ';')
{
ExceptionHelper.Throw((new SyntaxError("Expected \";\" at + " + CodeCoordinates.FromTextPosition(state.Code, i, 0))));
}
do
{
i++;
}while (Tools.IsWhiteSpace(state.Code[i]));
post = state.Code[i] == ')' ? null as CodeNode : ExpressionTree.Parse(state, ref i, forForLoop: true);
while (Tools.IsWhiteSpace(state.Code[i]))
{
i++;
}
if (state.Code[i] != ')')
{
ExceptionHelper.Throw((new SyntaxError("Expected \";\" at + " + CodeCoordinates.FromTextPosition(state.Code, i, 0))));
}
i++;
Tools.SkipSpaces(state.Code, ref i);
state.AllowBreak.Push(true);
state.AllowContinue.Push(true);
try
{
body = Parser.Parse(state, ref i, 0);
var vds = body as VariableDefinition;
if (vds != null)
{
if (vds.Kind >= VariableKind.ConstantInLexicalScope)
{
ExceptionHelper.ThrowSyntaxError("Block scope variables can not be declared in for-loop directly", state.Code, body.Position);
}
if (state.message != null)
{
state.message(MessageLevel.Warning, body.Position, body.Length, "Do not declare variables in for-loop directly");
}
}
}
finally
{
state.AllowBreak.Pop();
state.AllowContinue.Pop();
}
int startPos = index;
index = i;
result = new For()
{
_body = body,
_condition = condition,
_initializer = init,
_post = post,
labels = state.Labels.GetRange(state.Labels.Count - labelsCount, labelsCount).ToArray(),
Position = startPos,
Length = index - startPos
};
var vars = CodeBlock.extractVariables(state, oldVariablesCount);
result = new CodeBlock(new[] { result })
{
_variables = vars, Position = result.Position, Length = result.Length
};
}
finally
{
state.lexicalScopeLevel--;
}
return(result);
}
internal static CodeNode Parse(ParseInfo state, ref int index)
{
int i = index;
Tools.SkipSpaces(state.Code, ref i);
if (!Parser.Validate(state.Code, "for(", ref i) &&
(!Parser.Validate(state.Code, "for (", ref i)))
{
return(null);
}
Tools.SkipSpaces(state.Code, ref i);
var result = new ForOf()
{
_labels = state.Labels.GetRange(state.Labels.Count - state.LabelsCount, state.LabelsCount).ToArray()
};
VariableDescriptor[] vars = null;
var oldVariablesCount = state.Variables.Count;
state.lexicalScopeLevel++;
try
{
var vStart = i;
var variableName = "";
var variableNameStart = 0;
var variableDef = VariableDefinition.Parse(state, ref i, true);
if (variableDef == null)
{
if (state.Code[i] == ';')
{
return(null);
}
Tools.SkipSpaces(state.Code, ref i);
variableNameStart = i;
if (!Parser.ValidateName(state.Code, ref i, state.strict))
{
return(null);
}
variableName = Tools.Unescape(state.Code.Substring(variableNameStart, i - variableNameStart), state.strict);
variableDef = new Variable(variableName, state.lexicalScopeLevel)
{
Position = variableNameStart,
Length = i - variableNameStart,
ScopeLevel = state.lexicalScopeLevel
};
Tools.SkipSpaces(state.Code, ref i);
if (state.Code[i] == '=')
{
Tools.SkipSpaces(state.Code, ref i);
var defVal = ExpressionTree.Parse(state, ref i, false, false, false, true, true);
if (defVal == null)
{
return(defVal);
}
Expression exp = new AssignmentOperatorCache(variableDef as Variable);
exp = new Assignment(exp, defVal)
{
Position = exp.Position,
Length = defVal.EndPosition - exp.Position
};
if (variableDef == exp._left._left)
{
variableDef = exp;
}
Tools.SkipSpaces(state.Code, ref i);
}
}
else
{
variableName = (variableDef as VariableDefinition)._variables[0].name;
}
if (!Parser.Validate(state.Code, "of", ref i))
{
if (oldVariablesCount < state.Variables.Count)
{
state.Variables.RemoveRange(oldVariablesCount, state.Variables.Count - oldVariablesCount);
}
return(null);
}
if (state.strict)
{
if (variableName == "arguments" || variableName == "eval")
{
ExceptionHelper.ThrowSyntaxError(
"Parameters name may not be \"arguments\" or \"eval\" in strict mode at ",
state.Code,
variableDef.Position,
variableDef.Length);
}
}
if (variableDef is VariableDefinition)
{
if ((variableDef as VariableDefinition)._variables.Length > 1)
{
ExceptionHelper.ThrowSyntaxError("Too many variables in for-of loop", state.Code, i);
}
}
result._variable = variableDef;
state.LabelsCount = 0;
Tools.SkipSpaces(state.Code, ref i);
result._source = Parser.Parse(state, ref i, CodeFragmentType.Expression);
Tools.SkipSpaces(state.Code, ref i);
if (state.Code[i] != ')')
{
ExceptionHelper.Throw((new SyntaxError("Expected \")\" at + " + CodeCoordinates.FromTextPosition(state.Code, i, 0))));
}
i++;
state.AllowBreak.Push(true);
state.AllowContinue.Push(true);
result._body = Parser.Parse(state, ref i, 0);
state.AllowBreak.Pop();
state.AllowContinue.Pop();
result.Position = index;
result.Length = i - index;
index = i;
vars = CodeBlock.extractVariables(state, oldVariablesCount);
}
finally
{
state.lexicalScopeLevel--;
}
return(new CodeBlock(new[] { result })
{
_variables = vars,
Position = result.Position,
Length = result.Length
});
}
internal static CodeNode Parse(ParseInfo state, ref int index)
{
if (!Parser.Validate(state.Code, "export", ref index))
{
return(null);
}
Tools.SkipSpaces(state.Code, ref index);
var result = new ExportStatement();
var reexport = 0;
if (Parser.Validate(state.Code, "*", ref index))
{
reexport = 1;
}
else if (Parser.Validate(state.Code, "default", ref index))
{
reexport = -1;
Tools.SkipSpaces(state.Code, ref index);
using (state.WithCodeContext(CodeContext.InExport))
{
var variables = VariableDefinition.Parse(state, ref index);
if (variables != null)
{
result._internalDefinition = variables;
}
else
{
var expression = ClassDefinition.Parse(state, ref index)
?? FunctionDefinition.Parse(state, ref index, BaseLibrary.FunctionKind.Function)
?? ExpressionTree.Parse(state, ref index);
result._map.Add(new KeyValuePair <string, Expression>("", (Expression)expression));
}
}
}
else if (state.Code[index] == '{')
{
parseExportMap(result, state, ref index);
}
else
{
using (state.WithCodeContext(CodeContext.InExport))
{
reexport = -1;
var definition =
VariableDefinition.Parse(state, ref index)
?? ClassDefinition.Parse(state, ref index)
?? FunctionDefinition.Parse(state, ref index, BaseLibrary.FunctionKind.Function)
?? FunctionDefinition.Parse(state, ref index, BaseLibrary.FunctionKind.AsyncFunction);
if (definition == null)
{
ExceptionHelper.ThrowSyntaxError(Strings.UnexpectedToken, state.Code, index);
}
result._internalDefinition = definition;
}
}
Tools.SkipSpaces(state.Code, ref index);
if (Parser.Validate(state.Code, "from", ref index))
{
if (reexport == -1)
{
ExceptionHelper.ThrowSyntaxError("Reexport is not allowed with this syntax", state.Code, index - 4);
}
Tools.SkipSpaces(state.Code, ref index);
var start = index;
if (!Parser.ValidateString(state.Code, ref index, false))
{
ExceptionHelper.ThrowSyntaxError("Expected module name", state.Code, index);
}
result._reexportSourceModuleName = Tools.Unescape(state.Code.Substring(start + 1, index - start - 2), false);
}
else if (reexport == 1)
{
ExceptionHelper.ThrowSyntaxError("Expected 'from'", state.Code, index);
}
return(result);
}
